# Amazon Nova Pro vs Grok 4.5

> Grok 4.5 is the stronger model overall, scoring 55.0 to 30.5 on the Noometry Index. Amazon Nova Pro costs 2.1× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/amazon-nova-pro-vs-grok-4-5
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Amazon Nova Pro scores higher in 0 categories and Grok 4.5 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.0 to 19.2.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 300K.

## Snapshot

| | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 30.5 | 55.0 |
| Rank | 278 | 22 |
| Context | 300K | 500K |
| Input $/M | $0.80 | $2 |
| Output $/M | $3.20 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- Amazon Nova Pro: 34.6 (#224)
- Grok 4.5: 51.7 (#34)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Coding | 1270 | 1473 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1552 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| LiveBench Coding | 38.1% | — |
| ALE-Bench | — | 1,309 |

## Agentic & Tool Use

- Amazon Nova Pro: 16.6 (#139)
- Grok 4.5: 44.4 (#15)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| APEX-Agents | — | 56.2% |
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
| τ²-bench Banking | — | 47.9% |
| PostTrainBench | — | 23.4% |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| LMArena Search | — | 1213 |
| Vending-Bench 2 | — | 3,887 |

## Reasoning

- Amazon Nova Pro: 19.2 (#240)
- Grok 4.5: 56.0 (#23)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1462 |
| Epoch Capabilities Index | 123.75 | 154.02 |
| ARC-AGI-2 | — | 52.6% |
| SimpleBench | — | 70% |
| Kagi LLM Benchmark | — | 83.5% |
| NYT Connections (extended) | — | 79.9% |
| ARC-AGI-1 | — | 87.2% |
| CritPt | — | 15.4% |
| Chess Puzzles | — | 36% |
| LiveBench Reasoning | 32.6% | — |
| DTBench | — | 96.5% |
| LiveBench Data Analysis | 48.3% | — |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| LiveBench | 43.5% | — |

## Math

- Amazon Nova Pro: 26.4 (#240)
- Grok 4.5: 60.7 (#29)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Math | 1252 | 1457 |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |

## Knowledge

- Amazon Nova Pro: 27.1 (#246)
- Grok 4.5: 62.3 (#21)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Expert | 1211 | 1466 |
| GPQA Diamond | — | 93.4% |
| Humanity's Last Exam | 4.4% | — |
| SimpleQA Verified | — | 48.3% |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |

## Multimodal

- Amazon Nova Pro: 24.5 (#121)
- Grok 4.5: 37.8 (#63)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Vision | 980 | 1287 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |

## Multilingual

- Amazon Nova Pro: 39.9 (#218)
- Grok 4.5: 54.5 (#43)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1234 | 1439 |
| LMArena Chinese | 1244 | 1497 |
| LMArena French | 1270 | 1458 |
| LMArena German | 1243 | 1448 |
| LMArena Japanese | 1200 | 1425 |
| LMArena Korean | 1203 | 1402 |
| LMArena Russian | 1240 | 1447 |
| LMArena Spanish | 1182 | 1452 |

## Instruction Following

- Amazon Nova Pro: 65.1 (#221)
- Grok 4.5: 76.3 (#45)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1235 | 1446 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |

## Long Context

- Amazon Nova Pro: 38.1 (#199)
- Grok 4.5: 44.8 (#54)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1255 | 1463 |

## Writing & Preference

- Amazon Nova Pro: 44.1 (#221)
- Grok 4.5: 65.9 (#40)

| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Text | 1259 | 1448 |
| LMArena Creative Writing | 1212 | 1442 |
| LMArena Multi-Turn | 1245 | 1457 |
| Short-Story Creative Writing | 60.5% | — |
| EQ-Bench Creative Writing | — | 1579 |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |

## FAQ

### Is Amazon Nova Pro better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 30.5 on the Noometry Index. Amazon Nova Pro costs 2.1× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

### Which is cheaper, Amazon Nova Pro or Grok 4.5?

Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; Grok 4.5 lists at $2 and $6.

### Is Amazon Nova Pro or Grok 4.5 better for coding?

Grok 4.5 scores higher on coding benchmarks: 51.7 versus 34.6 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.5 does, with 500K tokens against 300K.

### How many benchmarks do Amazon Nova Pro and Grok 4.5 share?

19 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and Grok 4.5 has 52.